Driven-well point.



PATENTED APR. 12, 1904.

0. KAMPFE. DRIVEN WELL POINT. APPLICATION FILED JUNE 1a. 1903.

N0 MODEL.

in: cams PETERS co, PHDTO-LITHO, WASWNFTON. u. c,

UNiTen h TaTus Patented April 12, 1904.

PATENT OTTTCE.

OTTO KAMPFE, OF NEWV YORK, Y., ASSIGNOR OF ONE-HALF TO FREDERICK KAMPFE,OF BROOKLYN, NEW YORK.

DRIVEN-WELL POINT.

SPECIFICATION forming part of Letters Patent No. 757,124, dated April12, 1904.

Application filed June 19, 1903- Serial No. 162,256. (No model) To allwhom, it puny concern.-

Be it known that I, OTTOKAMPFE, a citizen of the United States, residingin New York, in the State of New York, have invented certain new anduseful Improvements in Driven-Well Points, of which the following is aspecification.

The object of this invention is to provide a wellpoint whereby thewell-pipe of a driven well may be driven with greater facility andrapidity and to a greaterdepth than permitted by the well-pointsheretofore in use. For this purpose the invention consists ofawell-point comprising a support and a rotary tip swiveled to saidsupport and pro vided with helically-an ranged grooves; andthe'invention consists, further,in certain details of construction andcombinations of parts, which will be fully described hereinafter andfinally pointed out in the claim.

In the accompanying drawings, Figure 1 is a side elevation of myimproved well-point, and Fig. 2 is a vertical central section throughthe same. 7

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A indicates the lower end of a driven-wellpipe. This lower end or section is provided in the usual manner withopenings at and with a netting of fine mesh a, inclosing thepipe-section and preventing ingress of earth,while permitting entranceof water or other liquid into the pipe. To the lower end of the pipe Ais secured a sleeve a which serves to reinforce said lower end and toincrease the exterior diameter of the same, so that friction between thenetting a and the earth which it passes in its travel is avoided. To thelower end of the tube A is secured a tip B of generally conical form,arranged longitudinally of the pipe in line therewith. The point isprovided with a helicallyarranged groove or plurality of such grooves b,extending, preferably, from the end of the tip to the base or widestportion of the same and forming between them ridges L, the edges orcrests of which are preferably sharp. To secure uniform direction oftravel of the tip when passing through the earth, the grooves arearranged symmetrically about the axis of the tip. The upper ends of theridges 6 between the grooves preferablyprotect material beyond thegroove (0 as shown in the drawings, and the lowest portions of thegrooves are preferably not so low as to be laterally within the sleeve(0 or either construction at the lower end of the pipe. Thetip B issecured rotatably to the pipe A by any suitable means-as, for example,by a stud b or projection extending from the upper end of the tip andreceived within the lower end of the pipe. This projection being ofsmaller diameter than the base of the tip, a shoulder b is formed at thejunction, which shoulder abuts with the lower end of the pipe or of thecollar (6 or both, and insures the driving of the tip ahead. A stud dclosely fits the pipe, and thereby rotates the tip B in properdirection. At the same time it closes the lower end of the pipe againstingress of earth. For further rotating the tip in connection with thepipe and without impairing its free rotation relatively thereto anannular groove t is cut in the stud and a screw 5 or plurality of suchscrews is inserted through the collar and-pipe, so that their in nerends project into said grooves. The tip is thereby swiveled, and thusretained on the pipe notwithstanding an upward movement of the latter,which sometimes becomes necessaryin the operation of well driving.

Wells are driven, when using my improved well-point, by forcibly drivingthe point downwardly into the earth until water or other desired liquidis reached, such lengths and sections of pipe being from time to timecoupled on the section A as may be necessary. The tip guides the pipe ina superior manner and passes obstructions with less difliculty than astationary tip. Its wedging action is more elfective than a planeconical tip of the same length and base, owing to the helical grooveswhich have opened wedged surfaces. I

Having thus described my invention, I claim as new and desire to secureby Letters Patent- A well-point, consisting of asupport, a rotatable tipprovided with helical grooves, a stud my invention I have signed my namein pres extengiicilg from said tip1 into said supplort and ence of twosubscribing Witnesses. provi e With an annu ar groove, anc meansconnected with said support and forming a OTTO KAMPFE' 5 swivelconnection with said stud, substantially Witnesses:

as set forth. HENRY J. SUHRBIER,

In testimony that I claim the foregoing as JOHN J. KITTLE.

